How did the universe bang into existence from nothing? Ask USA TODAY

Science reporter Dan Vergano answers this reader question about the big-bang theory. Have a question? Send it to us on Twitter using #askusatoday. You can also e-mail askusatoday@usatoday.com.

http://archive.newsleader.com/VideoNetwork/2296236432001/How-did-the-universe-bang-into-existence-from-nothing-Ask-USA-TODAYrtmp://cp17277.edgefcs.net/ondemand/&mp4:Brightcove/Brightcove2/29906170001/2013/04/29906170001_2294133278001_Ask-USA-TODAY-Big-Bang.mp4http://archive.newsleader.com/VideoNetwork/2296236432001/How-did-the-universe-bang-into-existence-from-nothing-Ask-USA-TODAYhttp://www.gannett-cdn.com/media/usatoday/usatoday/2013/04/11/afp_space-baby_galaxy_small.jpgHow did the universe bang into existence from nothing? Ask USA TODAYScience reporter Dan Vergano answers this reader question about the big-bang theory. Have a question? Send it to us on Twitter using #askusatoday. You can also e-mail askusatoday@usatoday.com.Editorial pageNASAcommongroundCommon GroundopinionUniverseAsk USA TODAYBig-bang theory01:18